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3 years ago

What is proportion of 18:72

1 answer:

4 0

A proportion is an equal ratio (or fraction)
18 divided by 18 is 1
72 divided by 18 is 4
so a proportion of 18:72 is 1:4

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An exercise class had 20 people. If each person produced 2,200 BTUs of body heat during the class and the room is 30 ft × 40 ft

Gnesinka [82]

First, we need the volume of the room. We get this by multiplying the length, width, and height. This gives us 18,000 ft^3. Now, we see how many BTUs were created. We do this by multiplying 2,200 by 20. This gives us 44,000. Now, we divide 44,000 by 18,000 to get our answer, which is 2.44 BTUs/ft^3, or C.

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3 years ago

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Need help ASSAP!. Scatter plot

kakasveta [241]

Answer:

Strong Negative Correlation

Step-by-step explanation:

The overall correlation is negative and the correlation coefficient is at least an 8.0 so the answer is B.) Strong Negative Correlation.

(Sorry I left before.)

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3 years ago

for the given license plate configuration, determine how many different plates are possinle if letters and digits (a) can ba rep

Inessa05 [86]

Answer:

a) 1,757,600 different plates possible.

b) 1,404,000 different plates possible.

Step-by-step explanation:

The permutations formula is important to solve this question.

Permutations formula:

The number of possible permutations of x elements from a set of n elements is given by the following formula:

$P_{(n,x)} = \frac{n!}{(n-x)!}$

(a) can be repeated:

There are 3 letters, each one with 26 possible outcomes.

2 digits, each with 10 possible outcomes

T = 26*26*26*10*10 = 1757600

1,757,600 different plates possible.

(b) cannot be repeated:

Here the permutations formula is used.

Three letters, from a set of 26.

Two digits, from a set of 10. So

$T = P_{(26,3)}*P_{(10,2)} = \frac{26!}{(26-3)!}*\frac{10!}{(10-2)!} = 1404000$

1,404,000 different plates possible.

4 0

3 years ago

If BC = 6.5, CD = 7.8, and AD = 12.2, find AB to the nearest tenth.

Sladkaya [172]

This can be solved using the angle bisector theorem. Note that line segment AD is the angle bisector of triangle DAB from angle DAB. Therefore, we know that the ratios $\frac{\text{AD}}{\text{CD}}$ and $\frac{\text{AB}}{\text{CB}}$ are equal. Solving, we get $\frac{\text{12.2}}{\text{7.8}}=\frac{\text{AB}}{\text{6.5}}$ . Cross multiplying, we get $79.3 = 7.8x$ , and solving this equation we get $x = 10.1666... \approx 10.2$ . 10.2 is your answer.

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4 years ago

708 divide by 67 . Then check the multiplication ?

Oxana [17]

708/67
67 goes into 708 ten times, but there is a remainder since 67 doesn't go into 708 completely. The remainder is what is left after being divided by a whole number, which is .567 in this case. So the answer would be 10.6 if you are rounding to tens, the longer version would be 10.67816418.

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3 years ago

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